Fluid pressure actuated shoe upper pressing machines



J. F. SMITH Aug; 27, 1957 FLUID PRESSURE ACTUATED SHOE UPPER PRESSING MACHINES Filed Aug. 5, 1954.

2 Sheets-Sheet l Aug. 27, 1957 J. F. SMITH 2,804,360

FLUID PRESSURE ACTUATED SHOE UPPER PRESSING MACHINES Filed Aug. 5, 1954 2 Sheets-Sheet 2 FLUID PRESSURE ACTUATED SHOE UPPER PRESSING MACHINES John F. Smith, Braintree, Mass., assignor to Comps Shoe Machinery Corporation, Boston, Mass, a corporation of Delaware Application August 5, 1954, Serial No. 448,007

2 Claims. (Cl. 309-2) This invention relates to machines particularly of the type used for pressing shoe uppers such as is disclosed in United States Letters Patent to Dodge No. 2,211,054 granted August 13, 1940, and is concerned more particularly with the construction and mounting of a fluid pressure actuating cylinder depending from the machine, particularly adapting it for such machines and by which it is made easy to assemble the cylinder with reference to the piping and the parts to be actuated thereby in such a manner that the piston rod lies and is movable in the same plane with the toggle arms by which the pressing mechanism is actuated.

For a complete understanding of this invention reference may be had to the accompanying drawings in which:

Figure 1 is a front elevation of a battery of three of such shoe pressing machines showing their connections to the fluid pressure system.

Figure 2 is a side elevation of one such machine.

Figure 3 is a diagram of a hydraulic system which may be used.

Figure 4 is a detail sectional view to a larger scale on line 44 of Figure 2.

Figure 5 is a fragmentary exploded perspective showing certain parts of the fluid pressure cylinder and connections.

Figure 6 is a detail sectional view on line 66 of Figure 4.

Referring first to Figures 1 and 2, a battery of shoe pressing machines, herein shown as comprising three such machines, are carried along the edge of a supporting table or bench 1. Each of these pressing machines comprises a support 2 carried by the table or bench and from which rises a central goose neck arm 3 at the forward end of which there is secured an inside shoe form 4 over which the shoe to be pressed may be placed. Cooperating with this central form 4 are a pair of outer pressing forms 5 carried at the upper ends of arms 6, each pivoted as at 7 to cars 8 extending upwardly from the support 2. As shown best in Figure 2, this support 2 is formed in cross section somewhat U shaped and between the upper and lower portions of this support the lower ends of the arms 6 are joined together by a pair of toggle links 10. Each of these links is pivoted at its outer end to the lower end of one of the arms 6, and the opposite ends of these toggle links are pivoted together as on the pivot 11. The pivot 11 is also connected to the upper end of a piston rod 15 which extends down through an enlarged internally threaded opening 16 in the support 2 and within a bushing 17 threaded into the opening 16. and which may be packed to a piston rod 15 as by the packing rings 18 and 19.

The bushing 17 is formed with an external annular shoulder 20 which may butt against the lower end of a cylindrical extension 21 of the support 2. The lower end of the bushing 17 extends into a cylindrical recess 22 and a peripheral flange 23 thereon extends into a counterbored portion 24 of this recess in the cylinder nited States Patent ice head 25. The flange 23 forms a seat or shoulder which is clamped in this counterbored portion 24 as by a ring 26, the inner edge of which at 27 overlies the top face of the flange 23 and is clamped in position as by screws 28.

A deformable packing 29 is positioned between the bushing and the cylinder head 25 and may be deformed into close engagement with the outer face of the piston rod 15. The lower end of the piston rod 15 has attached thereto a piston 30 which engages within the barrel portion 31 of the fluid pressure cylinder, the upper end of which is formed by the cylinder head 25. The lower end of the barrel 31 is closed off by a second cylinder head 32 which may be provided with a stop screw 33 threaded through its central portion and forming a limiting stop to limit the downward motion of the piston 30 and its rod 15 to the point where the toggle links are in substantially alined or in made position as shown in the dot and dash lines in Figure 4. In this position of the parts, the outer presser members 5 are in their pressing positions, engaging the outer face of the shoe upper placed over the central form and in which position the shoe upper is being pressed. The upper cylinder head 25 has a central downwardly extending tubular portion which limits the motion of the piston rod in the upward direction by impingement of the piston 30 thereon. 1

The packing ring 29 may be formed of rubber which is deformed between the cylinder head 25, the bushing 17, and the piston rod 15 so as to make a fluid tight joint therebetween.

The upper and lower cylinder heads 25 and 32 are sealed to the central barrel 31 as by packing rings 35 and 36 and the two heads are clamped against the barrel as by tie bolts 40 which extend through outwardly projecting lugs 41 and 42 on the upper and lower cylinder heads. By this arrangement ports 45 and 46 leading through the cylinder heads 23 and 32 may be angularly adjusted so as to facilitate insertion therein of pipe connections 47, 48, respectively, which lead from a controlling valve at 50. This valve controls flow from a manifold 51 connected to the pressure pipes 52 leading from a source of pressure supply at 53.

While the fluid pressure may, if desired, be compressed air, there is shown in Figure 3 a hydraulic pressure system similar to that shown in the Smith Patent No. 2,316,125.

Each valve 50, as shown in Figure 3, controls the flow of fluid under pressure from the supply 53 to the corresponding shoe pressing mechanism, and to the discharge pipe 54, and at 55 (Figure 3) is shown a discharge valve adjustable to limit the pressure derived from the pump 60.

The forming of the cylinder heads and barrel independently of each permits relative angular adjustment of the heads to bring the ports 45 and 46 in convenient angular relation to the pipes and the mounting of the cylinders depending from the supports 2 and with the pistons 15 operating in the same planes as the toggle links provides direct acting power mechanism of simple construction effective for its intended purpose.

From the foregoing description of an embodiment of this invention it will be evident to those skilled-in the art that various changes and modifications may be made therein without departing from its spirit or scope.

I claim:

1. A support having an internally threaded opening therethrough, a bushing threaded into said opening and having an opening therethrough, a piston rod extending through said bushing opening, packing rings between said rod and bushing, said bushing having a cylindrical extension terminating in a peripheral flange, a cylinder head having a counterbored recess in its outer face for receiving said flange, a clamping ring securing said flange in said recess, a second'cylinder head, a cylinder barrel between said heads, a piston slidable in said barrel and connectedto said piston rod, said head having passages extending therethrough intosaid barrel, and means for clamping said heads against opposite ends of said barrel. 2. A support having an internally threaded opening therethrough, a bushing threaded into said opening and having an opening therethrough, a piston rod extending through said bushing opening, packing rings between said rod and bushing, said bushing having a cylindrical extension terminating in a peripheral flange, a cylinder 7 extending therethrough into said barrel, means for clamping said heads against opposite ends of said barrel, and means carried by said heads limiting the extent of motion of said piston rod in opposite directions.

head having a counterbored recess in its outer face for receiving said flange, a clamping ring securing said flange in said recess, a second cylinder head, a cylinder barrel,

between said heads, apiston s lidable in said barrel and connected to said piston rod, said head having passages References Cited in the file of this patent UNITED STATES PATENTS 1,820,269 7 Craig Aug. 25, 1931 1,827,562 Carpenter Oct. 13, 1931 1,905,510 Russell Apr. 25, 1933 2,211,054 Dodge Aug. 13,1940 2,230,286 Cotner Feb. 4, 1941 2,316,125 Smith Apr. 6, 1943 2,399,550 Klein Apr. 30, 1946 2,426,108 Loewe Aug. 19, 1947 2,443,312 Geiger et June 15, 1948 

